Refrigerating apparatus



I M m W a 6 INVENTOR: P 12. P/m/PP,

ATTORNEY- L. A. PHILIPP Y REFRIGERATING APPARATUS April 27, 1937.

Filed Aug. 14, 1954 m st Apr. 21,1931

UNITED STATES PATENT, OFFICE i nnrmcnasrme armasrus Lawrence A. Philipp,Detroit, Mich, assignor to Kelvinator Corporation, Detroit, Mich acorporation of Michigan Application August 14, 1934, Serial No. 739,746

'2 Claims. (Cl. 62-3) used in accordance with the heat to be dissipated.

It is a further object of my invention to pro- 15 vide ,a refrigeratingsystem with a refrigerant condenser and a refrigerant compressor cooledby the same automatically regulated cooling water. v

More specifically it isan object of my inven- 20 tion to provide a watercooled refrigerant condenser and a water cooled refrigerant compressorwith means for automatically admitting a regulated quantity of water tothecondenser and means for conducting a divided portion of the 25gooling water to the compressor from the conenser.

The invention itself. however, bothfas to its,

organization'and its method of operation, together with additionalobjects and advantages 30 thereof, will best be understood from thefollowing description of specific embodiments when read in conjunctionwith the accompanying drawing. in which the single figure of .thedrawing is a diagrammatic view representing a re- 35 frigerating systemprovided with a cooling system in accordance with my invention.

Referring more. particularly tothe drawing the apparatus comprises arefrigerant evaporator I from which refrigerant vapor is drawn through40 a suction line 2 by a compressor 3. As the compressor operates itcompresses I the refrigerant vapor which is conducted through a conduitinto a condenser. I where its latent heat 01' 'vaporizationis absorbedby a succession of coils 4 it through which water or other coolingmedium I passes. As the-temperature of the compressed refrigerant vaporis lowered'by contact with the cooling coils itis liquefied. The liquidrefriger ant passes through a conduit It to the evapo- 50 rator I. Theadmission of liquid refrigerant to the evaporator from the-condenser 8may be controlled through conduit It by a valve I 6, in the evaporatorchamber which is actuated by an associated float l1 and lever mechanismit although my invention is not limited to systems of determined value.

this type and other known regulating arrangements may be used.

For the purpose of removing the heat generated by the operation of thecompressor a water Jacket 2| is provided in spaced enclosing relation .5

' around the cylinder and cylinder heat of the compressor. The waterjacket 21 of the compressor is connected through a conduit 22 to theoutlet pipe 23 from the cooling coils I I in the condenser. A drainpipe-24 extends from a discharge orifice in the water jacket to carrythe cooling water to the waste. A branch conduit 28 is connected from anintermediate point on the conduit 22 between the compressor and thecondenser and it also discharges water to the waste through a restrictedorifice 29. The restricted orifice" is selected to have a proper crosssectional discharge area to build up sufiicient back pressure to cause asuitable portion of the cooling water from the condenser to circulatearound the compressor jacket'2l. In actual practise the portion ofcondenser cooling water to .be passed around the compressor may be aboutten percent For example it 10,000 pounds of cooling water per hour mustpass through the condenser it 25 would be sufficient to pass about 1,000pounds of water around the compressor per hour.

It will be apparent that the pipes v23, 28 and 30 which carry coolingwater to and from the condenser 8 must bevery heavy pipes 01? large 30diameter. But the pipe 22 which conducts the water to the compressor maybe 'a light pipe of relatively small diameter which may be readily'extended to the compressor even though it be remotely situated. This isa very importantadvantage of the-present installation.

The inlet end of the cooling coil in the 0on denser 8 is connected tothe city water mains through a regulating valve 32 which isautomatically adjusted by a thermo responsive device. The temperatureresponsive device for regulating the flow of water may comprise a bulbwhich is mounted within the condenser I and connected through a smallpipe 34 into a flexible metal bellows 35 mounted adjacent the valve. The thermo bulb 33 contains a volatile reiriger-. ant or other liquidwhich will boil and generate vapor pressure when the temperature in thecondenser 6 to which itis exposed rises above a pre- The vapor pressuregenerated within the thermo bulb 33 is transmitted through the smallpipe 34 into the flexible bellows 35 which isthereby distended and actiates the water regulating valve 32 through a connecting rod 30 and crankmechanism 31 to accordingly regulate thefiow of water into condenserfrom the water mains.

During the operation 01' the compressor the volume of the cooling wateradmitted is regulated in accordancewith the temperature conditionswithin the condenser. After the water passes from the condenser 8through conduits 22 and 28 a portion of it is backed up by the pressureset up in the restricted discharge orifloe 28 and flows through thecompressor coolingjacket 2!. s v It'will be seen that I have provided arefrigerating system with cooling means wherein the quantity of coolingmedium used for the con- 5 denser andcompressor is automatically regu--lated by a single thermostatic valve in accord-- ance with thetemperature conditions or the sys-.

. tem and the cooling medium is emciently uti lized and divided betweenthe various elements 10 be cooled whereby a small flexible conduit 25vention in detail, it will be apparent that the invention is not'solimited, and that other i'orms and applications thereof are embracedwithin the scope oi; the appended claims.

I claim as my invention:

1. In a refrigerating system the combination of a water cooledrefrigerant condenser, a retrigerant compressor having va water coolingjacket, conduit means for passing cooling water flce for conducting aportion of the discharged coolingwater to the cooling Jacket oi thecompressor.

2. A refrigerating system comprising a fluid cooled condenser, arefrigerant compressor, a jacket extending around at least a portion ofsaid compressor, conduit means for conducting cooling fluid to saidcondenser, pressure reducing means associated with said conduit, means,and additional conduit means connected to the first conduit means aheadof said pressure reducing means for conducting a portion of said coolingfluid to said jacket.

' 'mwanncn A. PHILIPP.

